Improvement in window-sash ventilators



l. C. BATES.

` Window Sash Venti|aturs.` Y N'o.136,638. Patentedmarchnnss.

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UNITED STATES PATENT CFFICE.

` JOHN` O. BATES, OF COLD SPRING, NEW YORK.

- Specification forming part of Letters Patent No. 136,638, dated March 11, 1873.

'and I do hereloyl declare that the follo l.rin g is a full, clear, and exact description of the same, reference being had to the accompanying drawing forming part of this specification, in which- Figure 1 represents a window-sash to which my improved ventilator has been applied. Fig. 2 is a detail section ofthe same taken through the line w x, Fig. l. Fig. 3 is a detail section taken through the line yy, Fig. 2.

The invention relates to the well-known mode of Ventilating houses through air inlets and outlets in the window-sashes; and consists in employing two slides, relativelyapertured with respect to each other and to the sash-bar so as, to adinit either a directorindirect draft, as hereinafter described.

A repr"ents `.'la window-sash, in the upper and lower cross-bars of which are holes a.

Y B is asingle slide of the ordinary kind, having holes similar in shape, size, and position to the holes in the sash-bar. I use a double slide. The movement of the slide E is limited by a pin attached tothe sash-bar, and which enters a slot in the said slide E. The outer slide F has holes formed in it, and it is kept in place upon the slideE, and its movements are limited by headed pins or screws which pass through slots in the said slide F, and are attached to the said slide E. One of these pins or screws may have a knob attached to or formed upon it to serve as a handle for moving the slide E. The slide F may be moved by a knob attached to it. With this construction the slides E F may be so adjusted that the holes through them may be over eachy other, as shown in Figs. l and 2, giving a direct ventilation; or the holes in the sash and inner slide E may be over each other, as shown V in Fig. 3, in which case the air enters the room through the openings in the upper edge of the inner slide E orthe inner slide E may be so adjusted as to cover the holes in the sash-bar and exclude the air.

Having thus described my invention, whatk I claim as new, and desire to secure by Letters Patent, isl The application to a crolss-bar of the Window-sashA, having holes of the slides E F, relatively slotted as shown in' Fig. 3 of drawing and described, to admit the air directly or indirectly, in the manner set forth.

JOHN O. BATES. Witnesses:

ISAAC BATES, WM. J. FLOYD. 

